Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

How do you stop a TH350 from leaking?

Discussion in 'The Garage' started by colbystephens, Feb 21, 2006.

  1. colbystephens

    colbystephens 1 ton status GMOTM Winner

    Joined:
    Feb 24, 2005
    Posts:
    10,924
    Likes Received:
    20
    Location:
    Oregon
    so we got the 350 installed and it works fine, but when the fluid was being topped off, a bad leak was noticed from one of the bolts. Turns out one of the pan bolt hole is stripped - not the bolt, the tapped part in the transmission. what's the best way to fix this problem?
     
  2. Cricket

    Cricket 3/4 ton status

    Joined:
    Nov 29, 2004
    Posts:
    8,224
    Likes Received:
    0
    Location:
    Colorado
    Get a heli-coil kit. Drill out the stripped hole then screw in the heli-coil repair thread. Simple as it gets.
     
  3. TrcksR4ME

    TrcksR4ME 1/2 ton status

    Joined:
    Feb 11, 2002
    Posts:
    2,482
    Likes Received:
    0
    Location:
    Seattle, WA 98103
    Depending which bolt it is, you can probably just use a longer bolt and put a nut and washer on the other side. That would probably be the easiest thing to do.
     
  4. colbystephens

    colbystephens 1 ton status GMOTM Winner

    Joined:
    Feb 24, 2005
    Posts:
    10,924
    Likes Received:
    20
    Location:
    Oregon
    interesting, i didn't notice while the tranny was down that the holes go all the way thru.
     
  5. Citizen Rider

    Citizen Rider 1/2 ton status

    Joined:
    May 5, 2005
    Posts:
    1,415
    Likes Received:
    0
    Location:
    Plano, Texas
    My tranny when i pulled it from the blazer had longer bolts installed and nuts on the back. When i took it to the tranny shop to be rebuilt they added that they nuts on the case if put on some of the holes can put stress on teh side of the case. Didnt fully understand him, but they put in heli-coils where needed and works great.
     
  6. TrcksR4ME

    TrcksR4ME 1/2 ton status

    Joined:
    Feb 11, 2002
    Posts:
    2,482
    Likes Received:
    0
    Location:
    Seattle, WA 98103
    I'd think for one bolt it would be ok, and these shouldn't be bolted down too tight anyhow.
     
  7. Russell

    Russell LB7 Tahoe Status Premium Member GMOTM Winner

    Joined:
    Jun 23, 2000
    Posts:
    7,925
    Likes Received:
    337
    Location:
    Fort McMurray, Alberta
    I broke a bolt in my TH400's pan, and just drilled and tapped it for a 9/16ths bolt. Never had a problem with leaking :)
     
  8. roadnotca

    roadnotca 3/4 ton status

    Joined:
    Sep 16, 2005
    Posts:
    5,433
    Likes Received:
    1
    Location:
    Redondo Beach, CA
    they added that they nuts on the case if put on some of the holes can put stress on teh side of the case. Didnt fully understand him, but they put in heli-coils where needed and works great. Uh huh, sure.
    I'd think for one bolt it would be ok, and these shouldn't be bolted down too tight anyhow. Right, OK for any or all that have enough space on the back side. To a rebuild shop, the nuts on the back is "out-of-the-ordinary" which costs them $$. If its "heli-coiled" then it can be treated as regular production, but to "repair" the case with heli-coils costs you $$.
     

Share This Page